PBS: Once upon a time, Google was a simple white web page with a little search bar. Now, the company has its own Google Price Index, Google Television, a Google phone — even a “driverless” Google car. So what`s next for the search giant? Apparently, green energy. Google announced last week that it was investing at least $200 million in an unprecedented plan to build a transmission network for wind energy across the Atlantic Seabord. Called the Atlantic Wind Connection, the 350-mile spine would…